Method for removing the pulp from continuously-moving screens.



1 METHOD FQR REMOVYING THEFLULP FROM CONTINU'OUSLYMVING SCREENS.

AFPLICATION FILED NOV. I0, 19H` Mm Apr. 23,1918,

llllElllEllD FUR REMOVING THE PULP FROM CONTINUGSFLY-MOVING SCREENS.

recante.

mpplication filed November 10, 1917. Serial No. 201,264.

To all whom it may concern.'

Be it known that I, ANTON JULIUS SKJEN- Nnnnno, a subject of the King of Norway, residing atl Embretsfos, Modum, in C the Kingdom of Norway, have invented certain new and useful -llmprovements in Methods for Removing the Pulp fromv Continuously- Moving Screens; and ll do hereby declare the following to be a full, clear, and exact description of the invention, suchas will enable others skilled in the art tol which it` ing surface and a stationary surface formin an angle with the screening surface.

lhe said pulp bar or cylinderywill be rotated by its contact with the surface of the screening cylinder and during this rotation will continuously removethe pulp from the outside of the screening cylinder the pulp adhering more lirmly to the lpulp cylinder than to the Ascreening surface.

At 4a certain distance from the said cylinder is placed a stationary scraper or the like' which comes into contact with the pulp cylinder when the same has reached a certain diameter. From this moment the said scraper will remove all pulp adhering to the surface on the pulp cylinder lmaintaining the same on a certain diameter. rllhe said scraper may conveniently be formed by the 'upper edge of thev stationary surface supporting the pulp cylinder.

The method is particularly adapted for rotating screening cylinders and-is applied to the same by mounting a sloping board at some little distance from the upwardly moving part of the screening cylinder in such a.

manner that a wedge shaped channel is formed between said board and the screen-` ing surface.` A ball of pulp is placed in the said channel and .this ball rapidly grows in the manner of a' snow-ball finally form- 'v ing a bar or cylinder lling the channel along the whole length of the screening cylinder. When the diameter of this pul cylinder has reached a certain size the cy inder will continuously scrape against the upper edge of the board thus removing pulp from parting with it over the the cylinder and edge of the board.

ln the accompanying drawing is illustrated an arrangement by means of which the method may be carried out.

1 indicates part of the screening surface of a rotating screening cylinder which moves in the direction indicated by the arrow.

2 is a board which extends along the screening surface without touching the same and the upper end surface 3 of which forms a wedge shaped channel 4.- with the screening surface. The pulp cylinder formed in this channel is illustrated on the drawing with the diameter it'finally attains all new pulp taken up by 'the cylinder 5 being then scraped off by means of edge 6 of board 2.

Claims: y

1. rllhe method of removing pulp from a moving screen or the like, which comprises supporting a body of pulp in floating contact with the surface of the screen, whereby the pulp on the screening surface will adhere to said body and be removed from the screen.

2. rlhe method of removing pulp from a continuously moving screen `or .the like, which comprises supporting a body of pulp between an upwardly moving', part of the screening surface and a stationary surface so as to permit the rotation of said body, whereby the pulp on the screening surface will adhere to the rotating body and be removed from the screen.

3. The method of removing pulp from continuously moving screens or the like, which comprises supporting a cylinder or bar of pulp between an upwardly moving y part of the screening surface and a stationary surface sloping toward the screening surface, said cylinder or bar of pulp being rotated by the movement of the screening surface the pulp on the screening surface adhering to the pulp cylinder and being @hns removed from the screens.

4. The method of removing pulp from continuously moving screens or the like, which comprises supporting a cylinder or bar of pulp between an upwardly moving specification of Letters Patent. Y Patented lpl 23ll9ll.

part of the screening surface anda station- In testimony that I claim the foregoingary surface sloping towardthe screening suras my invention, I have signed my name in 10 aced'sid lfylinderor bar of pulp being ropresence of two subscribing witnesses.

tate y t e movement of the screenin sur- 5 face the pulp on the screening surfaa ad-l ANTON JULIUS SKJENNEBEBG' hering to the pulp cylinderand being con- Witnesses: tinuously scraped off the same by means of C. NORMAN,

a stationary-scraper. C. FABRICIUS HANSEN. 

